The «Fuzz Revisited: A Re-examination of the Reliability of UNIX Utilities and Services» paper in 1995 reported on exactly that. It made a bit of a splash at th

The «Fuzz Revisited: A Re-examination of the Reliability of UNIX Utilities and Services» paper in 1995 reported on exactly that. It made a bit of a splash at the time because the GNU command-line tools did noticeably better than the commercial ones. https://minds.wisconsin.edu/bitstream/handle/1793/59964/TR1268.pdf https://minds.wisconsin.edu/bitstream/handle/1793/59964/TR12...